GD&T Definitions - Datum
{"Image DocumentName": "GD&T Definitions - Datum", "Image ImageDescription": "A Datum is a theoretically exact plane, point or axis from which a dimensional measurement is made. A datum feature is a part feature that contacts a datum. A planar datum is the true geometric counterpart of palanar datum feature. Datum features and surfaces are actual part features and surfaces including all of their feature or surface inaccuracies. A true geometric counterpart is the theoretical perfect boundary or best fit tangent plane of a specified datum feature.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}